Composite pintle for conveyer links



May 7, 1929. c. c. BRAYTON COMPOSITE PINTLE FOR CONVEYER LINKS FiledAug. 19. 1926 Patentedl May 7, 1929i,

1,712,248 PATENT oFFlc'Er 'COBEY C. BRAYTON, 0F OAKLAND, CALIFORNIA,ASSIGNOB T0 AMERICAN MANGA-A NESE STEEL COMPANY, F CHICAGO, ILLINOIS, ACORPORATION 0F MAINE.

COMPOSITE PINTLE ron CoNvEYER LINKS'.

Application led August 19, 1926. Serial No. 130,145;

This invention relates to pintles for join-` ing together links ofconveyer chalns and the like, and particularly links of frame-llkeconstruction, comprising a barrel at one end and arms extending from thebarrel and spaced at their outer ends appropriately to lap upon the endsof the barrel of the next adjacent link.

By U. S. Patent No. 1,517,482, issued Delo cember 2, 1924, to American-ManganeseSteel Company, upon the invention of Donald H. Young, it wasproposedl to provide a compos. ite pintle joint for uniting theoverlapping side arms of one frame-like link to the barrel of anadjacent link by inserting a single tubular pintle member through all ofthe overlapping link members until the insert ed end was exposed at oneside, and a nonrotating seating head integral with the following en d ofthe hollow pintle brought up against the other side o the chain, andthen introduce a rivet in the direction opposite that in which thetubular pintle was inl"serted', until the 'inserted end of they rivetprojected beyond the integral seating head of the tubular pintle, and anintegral head upon the following end of the rivet brought up against theexposed inserted end of the tubular member and overlapped the surrounding portionof the link, and thereafter upset the inserted end of therivet to permanently complete the assembly. But in such pintle joints,it is necessary to use a tubular pintle member having a length equaltothe full i width of the chain, and to provide a cored openingentirelythrough the chain, and,

when assembled, the length of the tubular pintle becomes the measure oftightness with which'the links can be bound through means 4o of therivet, not only in the original assembly but in any replacement afterthe parts become more or less worn.

It lhas also been pro osed to articulate framed chain links by appingthe spaced ends of one link outside of the ends ofa transversestrut-like barrel integral with' the other link, and inserting conicalstuds throu h the?v outside link' ends and into nonrotatale bearing andaxial abutment with 5o the, cored ends of the barrel; but the axial*abutment of the conical studs against'the ,rigid strut provided by thebarrel, which needed no lateral sustention, left the outer lapped endsof the connected link free from the lateral confinement which thepresent inf,l

.ventiong moreover, it involved the complicaadmits of using the sametubular pintleimemv ention provides and transferred the rotationalbearing to the relatively thin lapped llink ends instead of to theelongated surfaces of inserted sleeves as in the present ini tion ofadditional parts such as a second pair lof conical studs entering thearticulating studs. It has also been proposed to articulate spaced linkends lapped outside of strutted link ends and united therewith by asingle piece pintle, itted at itsj'respective ends in the strut orbarrel, aridi-confined in its axial displacement by separately formedheads secured to the ends of' the pintle by transverse pins passingthrough each head and the pintle and embracing thev lapped outer linkends to resist rotation of the lpintle therein; but in such proposal,the non-rotation of the spindle depended upon the application ofseparately7 formed heads, as distinguished from heads integral with twoseparately formed andfaxially adjustable pintle sleeves, and thetransverse pins used to hold the parts in assembly are not comparablewith the setting up of a rivet head on the spindle in its effect uponthe tightening of the parts.. l v The present invention improves theconstruction of composite pintles, especially for chains of considerablewidth, where -a long transverse barrel is present, in that itinvolvesvery much less work in finishing the' bore through the transversebarrel, which is an important item when the links are of cast manganesesteel that can be finished only by grinding; it permits the use of anoriginallyv formed integral seating head at both ends of the tubularportion oi `the pintle instead of only one end-thereof; it

bers with chains of different width; it provides means for developing avariable length tie rod, the ends of which `are provided by headedpintle sleeves -`seated firmly and nonrotatably against the outside linkends while their cylindrical' portions, being freely movable in thevdirection of the-axis of articulation in the strutting barreljof theinside link, permit the outside -linkjends to be brought into'. firmlateral bearing with the inside link and provide elongated-*cylindricalturning bearin s;'the parte being held in such assembly y means of arivet that can be set up to' any desirable degree for maining fit afterthe parts become Worn; in other words, the present invention admits ofassembling the tubular members and securing rivet with such degree oftightness or limitation of lostmotion as will suit the particular jointbeing formed, both in original assembly and in case of replacement; andit involves other advantages.

The resent invention proceeds upon the princip e of introducing twoindependent cylindrical sleeve members from opposite sides of the chainuntil each is arrested by its own integral head finding non-rotatableseating against thev outside lapped member on its own side of' thechain, and having these independent sleeve members extend inwardly, intorotary bearing with but without axial abutment against the strut-likebarrel, but only fora relatiyely short distance, or just suiicient tokeep them normal to the longitudinal axis of the chain, thusnecessitating finishing of only the two end portions of the cored boreand the eyes of the adjacent link lapping thereon, and leaving theintermediate ortion of the cored bore available for pac ing withlubricant; these inserted tubular pintle ymembers being thus made toprovide a suitable size of confining head for both of the relativelythin lapped side bars of the adjacent link andbeing secured, and thedegree of pressure of their seated heads against vthe lapped ends of theylink being selectediby upsetting to an appropriate degree theprotruding end of a rivet which passes entirely through both tubularpintle members from side to side of the chain.

In the accompan ing drawing- Figure 1 is a p an view of several links ofa chain articulated through means of composite pintles embodying thesubjectmatter of the present invention, a portion of one joint being insection.

Figure 2 is a side elevation of the same.

Figure 3 is a transverse section on the line 3"--3x of Figures 1 and 2;and

Figure 4 is a detail View of one of the tubular. pintle members.

1 represents the barrel member, and 2 the side arms projecting therefromforming a frame-.like cast manganese steel link, a number.of which arearticulated to provide a conveyer chain,'and in the articulation ofwhich the ends of the side bars 2 of one link overlap and are pivotallysecured at the ends of the barrel of an adjacent link by means ofpintles passing through the hub portions 3 .on the side arms and theintervening barrel. Y' r In pivotally uniting parts a's stated, thepresent inventionprovides tubular pintle members 4 inserted from therespective sides through the hub portions 3, andinto the end portions ofthe intervening barrel 1, for such distance as will secure said pintleportions against deflection from theaxis of hinging movement; and eachtubular pintle member is provided with its own integral seating head 5that` overlaps and becomes the bearing portion in confinement of the hubportion 3 which it secures, the said head 5 bemg preferably confinedagainst turning by means of flanges 6, integral with hub portion 3, asis usual in the articulation of chain links. To confine the tubularmembers 4 in the positions described, a continuous rivet 7 having.integral heads 8 seating1 against the non-rotating ends 5 of thetubullar members is employed, one of the heads 8 being formed in situ byupsetting the protruding end of the rivet.

I claim:

In combination with chain links, comprising a barrel member on one linkoverlapped at its ends by spaced ends on another link, theI hereindescribed composite pintle consisting of separate pintle sleevesextending inwardly from the respective "sides of the chain, each througha lapped link end, and into the adjacent ends of the barrel member, anda rivet extending through all of said parts and having heads seatedagainst the respective sleeves; each of said sleeves beink constructedwith an integral head througli which it seats, under confinement of thesingle through rivet non-rotatably against the link end through whichAit passes; each sleeve having a cylindrical portlon'entering into rotaryearing within the barrel member but without axial abutment thereagainst;and the lapped ends bein held by the rivet.through' the medium of t 1esleeveheads against spreading underflateral bearing of the inside link.j A

Signed at Oakland,jCalifornia, this 28th day of July, 1926.

coaiaY c. BRAYToN.

